CVE-2018-14598: canonical ubuntu_linux Improper Input Validation
CVSS: 7.5v3.0HighModified
AliasesALPINE-CVE-2018-14598UBUNTU-CVE-2018-14598DEBIAN-CVE-2018-14598
Published 24-08-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-14598 is a high (CVSS 7.5) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 4.23% chance of exploitation in the next 30 days, higher than 90.9% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.0 (NVD)EPSS score
4.23%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 5Timeline
- 24-08-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS (segmentation fault).
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
4.23%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
0.00 pp
From 4.23% on 19-09-2026
19-09-202619-10-2026
EPSS score4.23%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- libx11< 2:1.6.6-1
- debian_linuxEOL8.0
Alpine1 product
- libx11< 1.6.6-r0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04
Fedoraproject1 product
- fedoraEOL28
Ubuntu1 product
- libx11< 2:1.6.2-1ubuntu2.1 | < 2:1.6.3-1ubuntu2.1 | < 2:1.6.4-3ubuntu0.1
X.org1 product
- libx11≤ 1.6.5
6 vendors · 7 products
References
18 links- cgit.freedesktop.org/xorg/lib/libX11/commit/?id=e83722768fd5c467ef61fa159e8c6278770b45c2X Refsource CONFIRMPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.x.org/archives/xorg-announce/2018-August/002916.htmlMailing ListX Refsource MLISTThird Party Advisory